My car won’t start: here’s what I always check before going to the garage or calling a mechanic

Ever turned the key and nothing happens? I’ve been there. From dead batteries to faulty starters, here’s what I’ve learned about car troubles – and what actually works.

I’ve had my fair share of mornings when my car just refuses to start, leaving me staring at the steering wheel in disbelief. Cars seem to have this uncanny ability to break down at the absolute worst possible moments – Sod’s law, as some might say.

After years of dealing with this, I’ve learned a lot about the most common culprits and what to do when your car won’t start. Here’s what I’ve experienced and a few helpful tips that might save you stress and time.

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1. Dead or weak battery

Most of the time, if my car won’t start, a dead battery is the culprit – often because I left the headlights on. A jump start and a 30-60 minute drive usually do the trick. If it keeps dying, it’s time to replace it. I test my battery regularly and check for corrosion; batteries generally last 5-8 years, and catching issues early saves headaches.

2. Faulty alternator

I’ve learned that a dead battery isn’t always the battery’s fault. The alternator keeps it charged, and if it fails, the battery dies anyway. Warning signs I’ve noticed include dim headlights or a flashing battery light on the dashboard. Worn belts or a loose connection can be easily fixed, but I’ve found it’s usually an issue best dealt with by a mechanic.

3. Wiring or electrical issues

Loose or damaged cables – from wear, water, or corrosion – can quietly sabotage a car. I’ve even heard of a friend who had rodents chew through wiring under their bonnet. I’d check the battery connections and look for any damage. Electrical tape can help temporarily, but real repairs need a professional.

4. Starter motor problems

A clicking noise when I turn the key usually points to the starter motor, which gets the engine turning in the first place. If a jump start doesn’t work, the starter likely needs replacing. This one’s beyond me… I always call a mechanic.

5. Worn spark plugs

Spark plugs – tiny but critical – ignite the air-fuel mixture in the engine’s cylinders. I once ignored a jerking engine, only to discover worn plugs were the culprit. Replacing them fixed the problem and prevented damage to the catalytic converter. I wouldn’t wait around to get it sorted though; regular maintenance keeps your engine firing smoothly.

6. Fuel system issues

Fuel problems can be sneaky. A clogged fuel filter or failing pump can make cars stall or misfire. I’d listen for uneven running, misfires, or warning lights. Replacing a filter is easy; bigger fixes usually need a mechanic.

7. Air supply blockages

It’s rare to happen, but a clogged air filter can prevent it from starting. I once managed to successfully address an overheating engine by swapping the filter out. Checking the intake system is usually simple and worth doing before panicking, and changing the filter itself only takes a few minutes.

8. Oil or coolant problems

Seeing oil pressure or temperature warnings on the dashboard is terrifying. Low oil or a coolant leak can seize an engine. My advice? Stop immediately and call for help. Restarting can make things much worse.

9. Jammed ignition or steering lock

Sometimes the key won’t turn because the steering wheel is locked. I gently rock the wheel while turning the key, sometimes with a second person, and it usually frees up. Be aware that forcing it can break the key.

What I’ve learned

As a motoring expert, here are a few quick tips I can share from my past experiences:

• Stay calm and assess the situation before reacting.
• Observe symptoms carefully to identify the problem.Learn basic troubleshooting to save time, money, and stress.
• Regularly check your battery and electrical systems.
• Pay attention to unusual noises from your car.
• Don’t ignore dashboard warning lights.

Yes, breakdowns happen – but with a little preparation, I’ve learned most problems are easy to handle.

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Looking for a new set of wheels? With Carwow you can sell your car quickly and for a fair price – as well as find great offers on your next one. Whether you’re looking to buy a car brand new, are after something used or you want to explore car leasing options, Carwow is your one stop shop for new car deals.

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